Hi there K.,
I would consider the "more bang for your buck" theory. Some of the interactive video/laptop systems seem really great, but lack variety/games/learning materials. From personal experience, the v-tech ones I think are the best. I got my son's first "laptop" when he was three. It had so many activities that he never got bored. He's going to be 5 here pretty soon, and are already looking into getting him a grownup laptop because of how well adaptive he has become with his own laptop and our computers (my son even googles and surfs the internet now!!!) So basically, look for the features available, and how many activities it has (especially spelling/problem solving ones) for the price. If price is not an issue then just get one with the most of everything. Happy shopping.....she will love no matter what you get for her!!!
B.